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<h1 class="title">borderlayout.cpp 示例文件</h1>
<span class="subtitle">layouts/borderlayout/borderlayout.cpp</span>
<!-- $$$layouts/borderlayout/borderlayout.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** &quot;Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
  **     notice, this list of conditions and the following disclaimer in
  **     the documentation and/or other materials provided with the
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  **   * Neither the name of The Qt Company Ltd nor the names of its
  **     contributors may be used to endorse or promote products derived
  **     from this software without specific prior written permission.
  **
  **
  ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ** &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/</span>

  <span class="preprocessor">#include &quot;borderlayout.h&quot;</span>

  BorderLayout<span class="operator">::</span>BorderLayout(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type">int</span> margin<span class="operator">,</span> <span class="type">int</span> spacing)
      : <span class="type"><a href="qlayout.html">QLayout</a></span>(parent)
  {
      setMargin(margin);
      setSpacing(spacing);
  }

  BorderLayout<span class="operator">::</span>BorderLayout(<span class="type">int</span> spacing)
  {
      setSpacing(spacing);
  }

  BorderLayout<span class="operator">::</span><span class="operator">~</span>BorderLayout()
  {
      <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>l;
      <span class="keyword">while</span> ((l <span class="operator">=</span> takeAt(<span class="number">0</span>)))
          <span class="keyword">delete</span> l;
  }

  <span class="type">void</span> BorderLayout<span class="operator">::</span>addItem(<span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>item)
  {
      add(item<span class="operator">,</span> West);
  }

  <span class="type">void</span> BorderLayout<span class="operator">::</span>addWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget<span class="operator">,</span> Position position)
  {
      add(<span class="keyword">new</span> <span class="type"><a href="qwidgetitem.html">QWidgetItem</a></span>(widget)<span class="operator">,</span> position);
  }

  <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Orientations BorderLayout<span class="operator">::</span>expandingDirections() <span class="keyword">const</span>
  {
      <span class="keyword">return</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal <span class="operator">|</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Vertical;
  }

  bool BorderLayout<span class="operator">::</span>hasHeightForWidth() <span class="keyword">const</span>
  {
      <span class="keyword">return</span> <span class="keyword">false</span>;
  }

  <span class="type">int</span> BorderLayout<span class="operator">::</span>count() <span class="keyword">const</span>
  {
      <span class="keyword">return</span> list<span class="operator">.</span>size();
  }

  <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>BorderLayout<span class="operator">::</span>itemAt(<span class="type">int</span> index) <span class="keyword">const</span>
  {
      ItemWrapper <span class="operator">*</span>wrapper <span class="operator">=</span> list<span class="operator">.</span>value(index);
      <span class="keyword">if</span> (wrapper)
          <span class="keyword">return</span> wrapper<span class="operator">-</span><span class="operator">&gt;</span>item;
      <span class="keyword">else</span>
          <span class="keyword">return</span> <span class="number">0</span>;
  }

  <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> BorderLayout<span class="operator">::</span>minimumSize() <span class="keyword">const</span>
  {
      <span class="keyword">return</span> calculateSize(MinimumSize);
  }

  <span class="type">void</span> BorderLayout<span class="operator">::</span>setGeometry(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> <span class="operator">&amp;</span>rect)
  {
      ItemWrapper <span class="operator">*</span>center <span class="operator">=</span> <span class="number">0</span>;
      <span class="type">int</span> eastWidth <span class="operator">=</span> <span class="number">0</span>;
      <span class="type">int</span> westWidth <span class="operator">=</span> <span class="number">0</span>;
      <span class="type">int</span> northHeight <span class="operator">=</span> <span class="number">0</span>;
      <span class="type">int</span> southHeight <span class="operator">=</span> <span class="number">0</span>;
      <span class="type">int</span> centerHeight <span class="operator">=</span> <span class="number">0</span>;
      <span class="type">int</span> i;

      <span class="type"><a href="qlayout.html">QLayout</a></span><span class="operator">::</span>setGeometry(rect);

      <span class="keyword">for</span> (i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> list<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
          ItemWrapper <span class="operator">*</span>wrapper <span class="operator">=</span> list<span class="operator">.</span>at(i);
          <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">&gt;</span>item;
          Position position <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">&gt;</span>position;

          <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> North) {
              item<span class="operator">-</span><span class="operator">&gt;</span>setGeometry(<span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(rect<span class="operator">.</span>x()<span class="operator">,</span> northHeight<span class="operator">,</span> rect<span class="operator">.</span>width()<span class="operator">,</span>
                                      item<span class="operator">-</span><span class="operator">&gt;</span>sizeHint()<span class="operator">.</span>height()));

              northHeight <span class="operator">+</span><span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>height() <span class="operator">+</span> spacing();
          } <span class="keyword">else</span> <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> South) {
              item<span class="operator">-</span><span class="operator">&gt;</span>setGeometry(<span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>x()<span class="operator">,</span>
                                      item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>y()<span class="operator">,</span> rect<span class="operator">.</span>width()<span class="operator">,</span>
                                      item<span class="operator">-</span><span class="operator">&gt;</span>sizeHint()<span class="operator">.</span>height()));

              southHeight <span class="operator">+</span><span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>height() <span class="operator">+</span> spacing();

              item<span class="operator">-</span><span class="operator">&gt;</span>setGeometry(<span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(rect<span class="operator">.</span>x()<span class="operator">,</span>
                                rect<span class="operator">.</span>y() <span class="operator">+</span> rect<span class="operator">.</span>height() <span class="operator">-</span> southHeight <span class="operator">+</span> spacing()<span class="operator">,</span>
                                item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>width()<span class="operator">,</span>
                                item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>height()));
          } <span class="keyword">else</span> <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> Center) {
              center <span class="operator">=</span> wrapper;
          }
      }

      centerHeight <span class="operator">=</span> rect<span class="operator">.</span>height() <span class="operator">-</span> northHeight <span class="operator">-</span> southHeight;

      <span class="keyword">for</span> (i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> list<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
          ItemWrapper <span class="operator">*</span>wrapper <span class="operator">=</span> list<span class="operator">.</span>at(i);
          <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">&gt;</span>item;
          Position position <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">&gt;</span>position;

          <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> West) {
              item<span class="operator">-</span><span class="operator">&gt;</span>setGeometry(<span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(rect<span class="operator">.</span>x() <span class="operator">+</span> westWidth<span class="operator">,</span> northHeight<span class="operator">,</span>
                                      item<span class="operator">-</span><span class="operator">&gt;</span>sizeHint()<span class="operator">.</span>width()<span class="operator">,</span> centerHeight));

              westWidth <span class="operator">+</span><span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>width() <span class="operator">+</span> spacing();
          } <span class="keyword">else</span> <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> East) {
              item<span class="operator">-</span><span class="operator">&gt;</span>setGeometry(<span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>x()<span class="operator">,</span> item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>y()<span class="operator">,</span>
                                      item<span class="operator">-</span><span class="operator">&gt;</span>sizeHint()<span class="operator">.</span>width()<span class="operator">,</span> centerHeight));

              eastWidth <span class="operator">+</span><span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>width() <span class="operator">+</span> spacing();

              item<span class="operator">-</span><span class="operator">&gt;</span>setGeometry(<span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(
                                rect<span class="operator">.</span>x() <span class="operator">+</span> rect<span class="operator">.</span>width() <span class="operator">-</span> eastWidth <span class="operator">+</span> spacing()<span class="operator">,</span>
                                northHeight<span class="operator">,</span> item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>width()<span class="operator">,</span>
                                item<span class="operator">-</span><span class="operator">&gt;</span>geometry()<span class="operator">.</span>height()));
          }
      }

      <span class="keyword">if</span> (center)
          center<span class="operator">-</span><span class="operator">&gt;</span>item<span class="operator">-</span><span class="operator">&gt;</span>setGeometry(<span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(westWidth<span class="operator">,</span> northHeight<span class="operator">,</span>
                                          rect<span class="operator">.</span>width() <span class="operator">-</span> eastWidth <span class="operator">-</span> westWidth<span class="operator">,</span>
                                          centerHeight));
  }

  <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> BorderLayout<span class="operator">::</span>sizeHint() <span class="keyword">const</span>
  {
      <span class="keyword">return</span> calculateSize(SizeHint);
  }

  <span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>BorderLayout<span class="operator">::</span>takeAt(<span class="type">int</span> index)
  {
      <span class="keyword">if</span> (index <span class="operator">&gt;</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&amp;</span><span class="operator">&amp;</span> index <span class="operator">&lt;</span> list<span class="operator">.</span>size()) {
          ItemWrapper <span class="operator">*</span>layoutStruct <span class="operator">=</span> list<span class="operator">.</span>takeAt(index);
          <span class="keyword">return</span> layoutStruct<span class="operator">-</span><span class="operator">&gt;</span>item;
      }
      <span class="keyword">return</span> <span class="number">0</span>;
  }

  <span class="type">void</span> BorderLayout<span class="operator">::</span>add(<span class="type"><a href="qlayoutitem.html">QLayoutItem</a></span> <span class="operator">*</span>item<span class="operator">,</span> Position position)
  {
      list<span class="operator">.</span>append(<span class="keyword">new</span> ItemWrapper(item<span class="operator">,</span> position));
  }

  <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> BorderLayout<span class="operator">::</span>calculateSize(SizeType sizeType) <span class="keyword">const</span>
  {
      <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> totalSize;

      <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> list<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
          ItemWrapper <span class="operator">*</span>wrapper <span class="operator">=</span> list<span class="operator">.</span>at(i);
          Position position <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">&gt;</span>position;
          <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> itemSize;

          <span class="keyword">if</span> (sizeType <span class="operator">=</span><span class="operator">=</span> MinimumSize)
              itemSize <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">&gt;</span>item<span class="operator">-</span><span class="operator">&gt;</span>minimumSize();
          <span class="keyword">else</span> <span class="comment">// (sizeType == SizeHint)</span>
              itemSize <span class="operator">=</span> wrapper<span class="operator">-</span><span class="operator">&gt;</span>item<span class="operator">-</span><span class="operator">&gt;</span>sizeHint();

          <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> North <span class="operator">|</span><span class="operator">|</span> position <span class="operator">=</span><span class="operator">=</span> South <span class="operator">|</span><span class="operator">|</span> position <span class="operator">=</span><span class="operator">=</span> Center)
              totalSize<span class="operator">.</span>rheight() <span class="operator">+</span><span class="operator">=</span> itemSize<span class="operator">.</span>height();

          <span class="keyword">if</span> (position <span class="operator">=</span><span class="operator">=</span> West <span class="operator">|</span><span class="operator">|</span> position <span class="operator">=</span><span class="operator">=</span> East <span class="operator">|</span><span class="operator">|</span> position <span class="operator">=</span><span class="operator">=</span> Center)
              totalSize<span class="operator">.</span>rwidth() <span class="operator">+</span><span class="operator">=</span> itemSize<span class="operator">.</span>width();
      }
      <span class="keyword">return</span> totalSize;
  }

</pre>
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<!-- @@@layouts/borderlayout/borderlayout.cpp -->
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   their respective owners.<br/>    The documentation provided herein is licensed under the terms of the    <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation    License version 1.3</a> as published by the Free Software Foundation.<br/>    Qt and respective logos are trademarks of The Qt Company Ltd.     in Finland and/or other countries worldwide. All other trademarks are property
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